Hemerobius contumax Tjeder, 1932 is a well known species of Hemerobiidae (Neuroptera) in Europe and Middle East countries, but has never been found in Asia. In Korea, a total of eight hemerobiid species have been recorded including the genus Hemerobius. So far only two species, Hemerobius humulinus and Hemerobius harmandinus are reported. Recently we collected another species of which the specific identity is in question: morphologically very similar to Hemerobius contumax but with c.a. 5% difference in COI barcode sequences. With 5% genetic difference, it may be easily considered as a different species from H. contumax. However, the adult image from the specimen sequenced for H. contumax found in the BOLD site is morphologically slightly off from the usual H. contumax, and there is still an investigation needed to confirm its specific identity. In any case, here we provide a brief description, photos of adult and male genitalia and DNA barcode sequence based the specimen examined.